If $\Delta U$ and $\Delta W$ represent the increase in internal energy and work done by the system respectively in a thermodynamic process, which of the following is true?

  • A

    $\Delta U  =  -\Delta  W$ , in a isothermal process

  • B

    $\Delta U  =  -\Delta  W$ ,in a adiabatic process

  • C

    $\Delta U  = \Delta  W$ ,  in a isothermal process

  • D

    $\Delta U  = \Delta  W$ ,in a adiabatic process

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